Cited by 952Pluripotent Stem Cells ResearchCardiac electrophysiology and arrhythmiasTissue Engineering and Regenerative Medicine

Biowire: a platform for maturation of human pluripotent stem cell–derived cardiomyocytes

Open access
Nunes, Sara S, Miklas, Jason W, Liu, Jie, Aschar-Sobbi, Roozbeh, Xiao, Yun, Zhang, Boyang, Jiang, Jiahua, Massé, Stéphane +9 more·2013·Nature Methods

Abstract

Directed differentiation protocols enable derivation of cardiomyocytes from human pluripotent stem cells (hPSCs) and permit engineering of human myocardium in vitro. However, hPSC-derived cardiomyocytes are reflective of very early human development, limiting their utility in the generation of in vitro models of mature myocardium. Here we describe a platform that combines three-dimensional cell cultivation with electrical stimulation to mature hPSC-derived cardiac tissues. We used quantitative structural, molecular and electrophysiological analyses to explain the responses of immature human myocardium to electrical stimulation and pacing. We demonstrated that the engineered platform allows for the generation of three-dimensional, aligned cardiac tissues (biowires) with frequent striations. Biowires submitted to electrical stimulation had markedly increased myofibril ultrastructural organization, elevated conduction velocity and improved both electrophysiological and Ca(2+) handling properties compared to nonstimulated controls. These changes were in agreement with cardiomyocyte maturation and were dependent on the stimulation rate.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/nmeth.2524

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Moderate positive chronotropy and reduction of stroke work at high isoproterenol doses are characteristic of immature tissues exhibiting poorly developed calcium handling, suggesting maturation protocols may be required to obtain positive force-frequency relationships as observed in healthy adult human ventricular myocardium.

    “The moderate positive chronotropy and reduction of stroke work observed at high isoproterenol doses are characteristic of immature tissues exhibiting poorly developed calcium handling properties8, suggesting that maturation protocols14,21,22,73 may be required to obtain positive force-frequency relationships, as observed in healthy adult human ventricular myocardium74.”

    From A tissue-engineered scale model of the heart ventricle (2018) · cites this paper as [14]

    Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured
  • EHTs have been successfully explored for disease modelling and drug compound screening.

    “EHTs demonstrate good predictive value for human (patho-)physiology (Sacchetto et al., 2020) and have been successfully explored for disease modelling and drug compound screening (Hansen et al., 2010;Nunes et al., 2013;Schwach et al., 2024).”

    From A human engineered mini-heart platform for mimicking ventricular pump function (2025) · cites this paper as Nunes et al., 2013

    The Introduction (page unavailable) describes stem-cell-derived cardiac tissues as an opportunity for modelling diseased hearts and screening therapeutic agents. The Results (“Stimulation improves Ca2+ handling properties,” page unavailable) report responses to several compounds in biowire cells. Neither passage establishes that the biowires were successfully used for disease modelling or drug-compound screening; the paper primarily tests their maturation. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • The sarcomeric organization of hvCOC resembled other human engineered cardiac tissue constructs and differed from random clusters.

    “with sarcomeric arrangements similar to other human engineered cardiac tissue constructs [14,21–23] but distinct from random clusters.”
  • Conventional EHTs typically consist of a strip of cardiac tissue formed around straight elastomeric supports or wires.

    “These in vitro models typically consist of a strip of cardiac tissue formed around straight elastomeric supports or wires (Goldfracht et al., 2019;Nunes et al., 2013), consequently lacking the cavity that is necessary for fluid pumping function.”

    From A human engineered mini-heart platform for mimicking ventricular pump function (2025) · cites this paper as Nunes et al., 2013

  • The structure and function of iPSC-CMs can be matured using mechanical and electrical stimulation, prolonged culture periods, and co-culture in the presence of CFs or endothelial cells.

    “The structure and function of iPSC-CMs can be matured using mechanical and electrical stimulation42,49, prolonged culture periods64,65, and also co-culture in the presence of CFs or endothelial cells66.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Nunes, S. S., Miklas, J. W., Liu, J., Aschar-Sobbi, R., Xiao, Y., Zhang, B., Jiang, J., Massé, S., Gagliardi, M., Hsieh, A., Thavandiran, N., Laflamme, M. A., Nanthakumar, K., Gross, G. J., Backx, P. H., Keller, G., & Radisic, M.
Affiliations
  • University of Toronto (CA)
  • Hospital for Sick Children (CA)
  • Toronto General Hospital (CA)
  • University Health Network (CA)
  • University of Washington (US)
Corresponding author
Radisic, Milica
Venue
Nature Methods
Published
2013-06-23
Volume
10
Issue
8
Pages
781-787
ISSN
  • 1548-7091 (ISSN-L)
  • 1548-7105
OpenAlex
W2035312069
Cited by
952
References
46
Citations by year
2026: 33 · 2025: 53 · 2024: 74 · 2023: 78 · 2022: 82 · 2021: 103 · 2020: 97 · 2019: 85 · 2018: 70 · 2017: 80 · 2016: 82 · 2015: 65 · 2014: 42 · 2013: 8
FWCI
29.39
Type
journal article
Language
en
Open access
Locations
  • Nature Methods (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (2r01hl076485-16)
  • Canadian Institutes of Health Research (MOP62954, 120196_1, 104296_1, 385981-10, 126027_1)
  • National Heart, Lung, and Blood Institute (2R01 HL076485, R01HL117991, P01HL094374, T32HL007828)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
Keywords
cardiomyocyte maturation, human pluripotent stem cells, electrical stimulation, myofibril ultrastructure, conduction velocity, calcium handling, electrophysiology, pacing rate
MeSH terms
Cell Differentiation, Electric Stimulation, Humans, Myocardium, Cell Culture Techniques, Tissue Engineering, Myocytes, Cardiac, Microscopy, Electron, Transmission, Electrophysiological Phenomena, Induced Pluripotent Stem Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review